replacement operators for Silver Line vinyl casement windows

A handy person from Abaco Bahamas says:
December 21, 2018
Operator pictured was purchased from Swisco within last 4 yrs. Have not identified a replacement in your on-line catalogue with same measurements. 39-329/30 appear to be closest.
House directly on ocean. Salt spray degrades operators within 3 yrs On 3rd set of operators. Would be nice to find corrosion resistant operators if possible
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Bob from SWISCO responded:
December 21, 2018

Thanks for contacting SWISCO. I agree that our 39-329 and 39-330 look like potential matches, but compare again with the dimensions on the product page to be sure. As far as being resistant from salt spray, operators in this style have a rust-resistant powder coating, but unfortunately I cannot guarantee that they'd be safe against other elements.
LH Inverted Split Arm ROTO Operator, Vinyl App
LH Inverted Split Arm ROTO Operator, Vinyl App
39-329
$34.78
RH Inverted Split Arm ROTO Operator, Vinyl App
RH Inverted Split Arm ROTO Operator, Vinyl App
39-330
$34.78
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